Detecting red tides in the eastern seto inland sea with satellite ocean color imagery

W. Takahashi, H. Kawamura, T. Omura, K. Furuya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A multi-spectral classification scheme is proposed to identify areas with red tides through the satellite ocean color imagery by the sea-viewing wide field-of-view sensor (SeaWiFS). The eastern Seto Inland Sea, where serious red tides frequently occur, was studied. Colors of the water around a red tide or those emerging before/after that are referred to as "background ocean colors (hereafter BOCs)", and BOCs are estimated as the monthly mean of normalized water-leaving radiances (nLw) with 0.01 degree spatial resolution with SeaWiFS imagery. Criteria for detection of red tide pixels are established through analyses of the features of nLw (at 443, 490, 510, and 555nm) anomalies from BOCs and the nLw spectra together with the red tide records in Osaka Bay. The proposed scheme efficiently indicates the presence of red tides for individual match-ups with 92% accuracy, and this suggests that the scheme is appropriate to detect red tides for optically complex coastal water of Osaka Bay.

Original languageEnglish
Title of host publication25th Anniversary IGARSS 2005
Subtitle of host publicationIEEE International Geoscience and Remote Sensing Symposium
Pages1924-1927
Number of pages4
DOIs
Publication statusPublished - 2005 Dec 1
Event2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005 - Seoul, Korea, Republic of
Duration: 2005 Jul 252005 Jul 29

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
Volume3

Other

Other2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005
CountryKorea, Republic of
CitySeoul
Period05/7/2505/7/29

Keywords

  • Red tides
  • Satellite ocean color remote sensing
  • SeaWiFS
  • Seto Inland Sea

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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